Heat-conserving apparatus



R. N. EHRHARY.

HEAT CONSERVING APPARATUS.

mwucmon mu) NOV. 2|. I917,

1,343,666. Patented J uno 15, 1920.

2 SHEETS SHEET 1.

9 6 5 /0 WW I H M H lLlmQ 7 202 2 Azmitiar Turbine /6 A5 Induction 0107' fltlllldl'al! G171! INVENTOR m/w. 644w HIS ATTORNEY IN FACT R. N. EHRHART.

HEAT CONSERVJNG APMRATUS. APPLICAHON mu] NOV 2:, ml.

'1 43,666. Patented June 15, 1920.

2 SHEETS*SHEET 2.

Auxiliary Turbine 2.9 Motion/mm /23 g T L9 in liedlmz'zon Gal! INVENTOR.

Zia/02W HIS ATTORNEY IN FACT UNITED STATES PATENT OFFICE.

RAYMOND NQ HRHART. OF nnonwoon PARK. PENNSYLVANIA. ASSIGNOR T0 wesr- INGHOUSE ELECTRIC & MANUFACTURING 00.. A oonroimrion or PENNSYL VANIA.

HEAT-CONSRRVING APPARATUS.

Specifleation of Letters I'atent.

Patented J uiie 15, 1920.

Application filed November 21, 1917. Serial No. 203,261.

1mm, a citizen of the United ltutes, and

a resident of Edgewood Park, in the county of Allegheny and State of lelinsylvmiizn.

have made a new and useful Invention In Heat-Conserving Apparatus, of which the following is a specification.

This invention relates to the eonservation of heat in power developing systems, and has for an object to produce a new and improved apparatus for preventingnr reducing the loss of heat from such a system.

In power plants the feed water for the boilers or steam generators is often heated by exhaust steam from the uuxiliurimi; that is, by steam exhausted from the turbines or engines which drive the eireuhitiug pumps. air pumps, feed water pumps and the like.

The load on the auxiliaries is sulmtantially constant irrespective of the load on the main power developing units. rousequently under some operating Conditions the amount of exhaust steam .amilahle for feed heating purposes may he eoiisiderahly in excess of that required. For example. when the main units are operating under light. loads the amount oi feed water to he heated is small, but the steam delivered by the auxiliaries is approximately the same as under f-ull load conditions and mnsequently is in excess of the amount required to heat the feed water to the desired temperature. As a result the excess steam is disclnuglui to the atmosphere with the attendant heat loss to the system. It is evident that it is desirable to noportiou the amount of available exhaust steam for heating feed water to the amount of feed Water to he heated. so that all of the iivuilahle heat in the exhaust steam \vill he eronomieuily utilized.

A more specific object of my invention is to produce an apparatus for maintaining a balanee between the amount of exhaust steam available for feed water heating" and the amount of feed water to he heated.

A further object is to produce a power developing, apparatus in \vhirh the loud on the steam driven auxiliaries is varied in accordance with the amount of exhaust steam required for feed water heating purposes.

A further ohjeet is to produce new and improved apparatus for controlling the delivery of steam to the feed water heater.

These and other objects are attained by means of apparatus Qllllu'ulyilig the l'euiuri-s herein desrrihed and illustrated in the drun in o: uerompauying and. forming u purl hereof.

In the drawing: Figure l is u din -mun.

nuitir view of a power developing; HFSlt-lll euuhodyin; my invention. :1 portion of the apparatus being shown in seetion.

Fig. 2 is :1 diagrammatic part nec'tiluull view of a second system embodying my in yeution.

Condensers are usually the rhiel uu'xil iaries employed in eonnertion with large power developing units. They require the greuteet proportion of the power consumed by the auxilioriw :md are frequently driven by steam operated turhines or motors. many eases all of the vondenser uuxiliurn-s. surh as the (-irrulutin; pump. air pump und the Condensing pump are driven hr :1 single motor, engine. or tux-lune. Without intendinn to in any \\'1 y limit my invention] lmve illustrated it in eonuertion with condenser auxiliary apparatus.

The :lppuratim illustrated in Fig. l ineludes a turhine 5 adapted in rm-eive steam through an inlet port (3 nod to disrhurge it through all exhaust port 7 into :1 i-oiulonuer i is shown. the turbine 7 is provided with a speed responsive governor 9 whirl; mmtrols the delivery of steam to the turl iue by means of a valve 10 hunted hetween the inlet port (1 and the \vorking pafluugeu ll of the turbine.

The rondenser H illustrated is of the jet type, having: a vertirul vy-liaulriml shell 1:? eonnnunii-utino dirertly at the top with the exhaust port T of tluturliim- ."1 and illlllh hating at the bottom in u rondemulv well 1:. The rondenser auxiliaries Sueh us the condensate pump 14 and the air pump 131111 loruted in the oondensute \vell lil or adjacent thereto and are axially ulined so that :1 single drivin" uhai't 16 may serve for :lil.

As shown the auxiliaries are driven h v means ol' an elerlricmotor 17 1"'.m]|i l dil'el'tly to the shall 10. and ul o by naming oi nn uuxiliury steam turlline in. \vhleh is o u-rutiveiy connected to the motor i? so that it may rurry a part or all of th loud depending on the amount of Qteum 'lwliw-rod to it The turhineis shown comm-ted 1o the motor by a reduetion gearing l9 ivhiwh euahlee both the turbine N and the punip to llt 2H um 1 l3 rmiwili rillill'lllgjll illt n2 \Illillll tllv mum inlvt may 13ml. Willi elm-ll 1m IHI'EEHQ'E'IIV'H lw uprisin ul' llac inux55 will imt mu the unimwl, ml 5mm: llvliw-r'wl in tin; gnxili-iv tlirlain l zellllungii la Sltilill r'lmwu'ngilmn Hf illi- 2min turbine will lily i-lanzmluruElly intmull liy mnnwting 11w "HElilIlt ill in tlw \wrking iifl Hiijfq nl' tilt mum turllinv ill m" (m ilaw lam ii'lel'wfilll'i hl ll Hf tin mim wl' Ell"ll\\'i 0i liu ia g gmss ilai: pro il'v in illi' rmulnil' will vary in pummt'itjm tn tlu. total :zmrmnt Ul' mun fiiuwing ilfi'lmgll llw UlIllllh nu l tlwhtl'nn: l'lw amount iilulrwlwn 22ml lli-livmwl t0 thv auxiliary tnrliirw l -w will always we a tilllJFtiiEitiull dmfinilv rminn 41! the Wlmlo lit -1fl111i' liilliiilfix tlw nlzrsalwr ul' bygmcsw auxiliary inlvt; may be Eur-l1 tlmt it will i new "'lry tax wmnert llw mmcluit 2U M H paint wi l along lmnirsl llH" QXllfllliirfii tinlzn-hinii' nillll tn :01 p: 211+ variations truly pmgmrtinmll in law initial amount in stvam filming ilu'mlgrli l'lw lili'lllill. Tlw u'vssm'e a?" 1 eam witiulmwn a! suvli a pnint might lit (P lmx that it would not lav w-mmmiczllly #2111 )lOVNl in lll -]Il{ f the auxiiim'y turbine. in Fig 1 lmvi? illustrated :1 ale-n1 in Willfl; I lmi'v gv'z'nillwl mums. for supplying high prvssmv t0 the mixilin1' 'tu1'i imin amounts prepm'tional tutlle film tln'mlgh a low px'wwure stage of the main lillllllll. 1

fa Hill! n the 5; sham inqlmlvs a main turllinv JF {-li:igrznrunatifially illnstmtmi as a pure impulse turbine) 21 Hawk ns?! 5?. mm rlvnsvi' mlxilinzi F 5'. a driving" nmtm' l? thvwfm. ulvl ii gem-ell auxiliary HH'hlIll 1H for sup ilvmvming the maim- 1I" all aw mug-(l as in Fig. i.

'lha unxilimv turbine 18' is adapted in llllriwn by high prvssure steam delivered to it by meam of :1 mnduit .23. It will. of (nurse. bu llil ii'ffiifiufi that after lining wurk in the auxiliary turbine this steam, is vmplnyeil for livating tho lmilm' t'vwl wulm. in order to proportion the amount of this: strum tn the amount; of steam passing;- Tlu'uugli tlw main Harbin! 5, l have pruviclml a ive 2-1 in llw 'a-muluit 23 which is re spunsive in ups' z'itirm tn \m'iatiuns in pres:- HUI? ut' the stenmpassing through the main tmhimat u pmint wlwrv tlii pressure is a m 4 m has tvnv measure at the total ammzam of steam passing; tlu'nug h the tun.

wt: m

Hit

As shown, a conduit 520 communicates with the working passage of the main turhine 5 at a point. beyond any bypass or auxiliary inlets, and is adapted to transmit the pressure existing in the main turbine at this oint to a cylinder 25 cooperativelv locate with relation to the. valve 24. A piston 26 operates within this cylinder and is shown as -mounted on the stem Q7 of the valve 24-. A similar piston 28 is also mounted on the stem 27 below the piston 2t; and operates Within a cylinder 29, A conduit 34) tonnects the cylinder 29 with the conduit 23 on the deliveryside' of the valve 2i.

The 0 eration of the apparatus illustrated 154 as fol ows: the amount of steam traversing the main turbine 5 is increased or decreased, the pressure at the point ol connection of the conduit 20' correspondingly increases or .(lBCL'BlISEH, and causes oorrespending variations of pressure within the cylinder 25. Pressure on the pietou 26 tends to move the valve 24 to the wide open pt sition, but as the valve opens and admits more steam to the auxiliary turhino 1n. the fluid pressure acting on the piston 28. in opposition to that on the piston 24", inrreases, ronsequently the valve 24. will open or Close amounts corres )ondin to variations in pres;- snro within the Working passage of the turbine. The effective areas of the pistons 26 and are proportional to compensate For the difference in pressure of the steam dolivered to each. As the ratio between piston diameters is ronstant, the pressurc ratio will he constant and consequently the ratio of the amount of -steam passing through the main turbine 5 to that passing through the auxiliary turhine 19 will he constant.

it is evident that the pressure at the iulet of the auxiliary turbine will always he (llll('ll Y proportional to the pressure at a definite point in the working passage of the main tnrhine. and since the pressure at this point is proportional to the flow of steam through the turbine. it follows that the How through the auxiliary turhine 18' must he proportional to the flow through the rn'ain tnrhine 5. With this arrange nient only small connections need he made with the main. turhine 5. and the auxiliaries may therefore he iionveniently located in any part of the power plant.

While I have desrrihed and illustrated sever-a einhodimcnts of my invention. it will he apparent to those skilled in the art that various changes. modifira'tions. additions and omissions may he made in the apparatus illustrated without departing: from the spirit and scope of my invention as set forth by the appended claims,

What I claim is:

1. In a power developing syetem, a m n power developing unit, an auxiliary power flel'flfilllllff unit. a feed water heater adapt-- rousuniing unit, means for heating, holler.

food water with the st am exhausted by the auxiliary unit. and llll'llTlS l'or var-yin; thc delivery of steam to the auxiliary unit in response to variations in pressure in the main unit.

3. In a power developing system. a steam driven main power unit, an auxiliary. a strain avtnated auxiliary power unit for driving said auxiliary. a feed watcr heater in whi -h the amount of water to he heated varies with variations in the amount of steam lliH'El'SlIlg the heater, and which receives Sll'lllll exhausted from said auxiliary unit. and means for withdrawing from the main unit the steam delivered to the auxiliary unit so lhat the heating; steam supply to the feed water heater varies with the varialim'is in the amount of steam traversing the main unit.

l. in rmnhination in a. power LlGVQlUPlllgI system a. main power devoli'iping unit, aux iliaries ll'l rf'l'ii viltl, a feed water heater in which the feed water is heated by exhaust steam from the auxiliaries, and means for proportioning the delivery of steam to the auxiliaries to the amount of steam eonsumed by the main unit so that a heat halanoo is maintained and substantially all of the available heat in the exhaust steam is given up to the feed waten in a power developing system, a main power developing unitran auxiliary power developing unit. a feed water heater adapt ed to receive exlniust fluid from the auxiliary unit. and means for proportioning the delivery of fluid to the auxiliary unit in response to variations in the flow of motive fluid through the main unit.

6, in a. power developing system, a main power i'levelopingi unit. an auxiliary power developing: unit. a feed water healer adapt ed to receive exhaust fluid from the auxiliary unit and means for proportioning the delivery of heating: fluid to the heater in response to variations in the flow of motive fluid through the main unit.

T. ln :1 power developing system. a main fluid operated power developing unit, a feed water heater adapted to receive teed water from the main power unit. an. auxiliary fluid operated power developing unit, a fluid supply for the auxiliary unit. means for utiliyinp the exhaust fluid from the aux iliary unit in heating the feed water. and means for controlling the fluid supply to the auxiliary unit respon ive to Iluid pressure in the main unit.

H. In a power developing systrm, :i uuiin fluid operated power dcvvloping unit, an auxiliary fluid upended power unit, 1| fluid supply for the auxiliary unit, u feud wutur lwutrl u luptcd ti rem-in ford water from llw uluiu unit und to In hunted by ('XlHlllSiZ Irum tluauxiliary unit. and menu; cull uwtiug llu- :lll\lll:tl' unit lluid supply with lluumin unit u'luu'e-lrr llusuid lluid sup: |:i\ llmutlinllml l1 prrsuul'o in tin: main unit.

H. In u pum-r dun-lupin hystrni in which llusit-um l'nnu Huuuiiu power unit is (rundi-usi-d. thv riulliu; vruulrnuutu is deliver-0d in u I'm-d uulvr liiJlU'I ulul t|ulimiter rewire irum tXllZlllhtWi from un auxiliary pmu-r dmi-luping unit iii the limiting lluid fwl' liir wiulplr-uli. u muiu puuvr dcmluping unit, a feed water heater, an auxiliary. un uuxiliarv power dweluping unit for driving said auxiliary and exhausting into said heater, means for delivering motive fluid to the auxiliary power unit from :1 wurking pussage 0f the main unit, :llUi means for supplementing the power (lelirercd t0 the auxiliary power developing uuil \vlleruhy the power transmitted to the auxiliary is independent 0f the amount of strum traversing the working Imssngu of fli auxiliary unit.

in tvstimuny whermf 1 have hereunto sulisuribed my name this 19th day of NW wrulmr, WIT. 

